New 15 in. 15x8 Rear Wheels And Tires For Dads 72 340 Duster

My Father Is The Original Owner Of A 72 340 Duster.
The Original 340 Has Never Been Redone And He Decided It Was Time Being Tired.
Doing Some Internal Mods But Nothing Crazy Will Be More Powerful.
That Thing Always Ran Great And Did'nt Even Think Of Hooking Up Then.
He Wants To Get A Good Drag Radial But Nothing Is Available In 14in.
Time To Replace The 14 in. 5x4 Bolt Rallys With Some Rear 15x8 4.625 Backspace Wheel by Wheel Vintiques
Has Anyone Used These On A Stock Duster With No Quarter Panel Or Spring Mods?
Thanks In Advance
Mike Z.